Fritz Haber Institute of the Max Planck Society
EU Marie Curie RTN "Universal Principles of Pattern Formation"
DFG Collaborative Research Center 555 "Complex Nonlinear Processes"

Fifth International Symposium
Engineering of Chemical Complexity
Berlin, May 25-27, 2008

Program and Organization: G. Ertl, A. S. Mikhailov

The aim of this meeting is to review current perspectives for design, manipulation and efficient control of self-organizing complex chemical systems, ranging from biotechnology and reactive nanostructures to macroscopic pattern formation in chemical reactors. Both experimental studies of such phenomena and their mathematical modeling will be discussed. Possible technological applications of self-organization phenomena shall be considered.

Invited Speakers

M. Bär (Berlin, Germany)
C. Beta (Potsdam, Germany)
E. Bodenschatz(Göttingen, Germany)
P. De Kepper (Bordeaux, France)
A. De Wit (Brussels, Belgium)
H. Engel (Berlin, Germany)
I. R. Epstein (Waltham, USA)
M. Falcke (Berlin, Germany)
B. Fiedler (Berlin, Germany)
P. Gaspard (Brussels, Belgium)
M. Hauser (Magdeburg, Germany)
J. L. Hudson (Charlottesville, USA)
R. Imbihl (Hannover, Germany)
R. E. Kapral (Toronto, Canada)
I. G. Kevrekidis (Princeton, USA)
K. Krischer (München, Germany)
Y. Kuramoto (Kyoto, Japan)
M. Marek (Prague, Czech Republic)
Y. Nishiura (Sapporo, Japan)
H. H. Rotermund (Halifax, Canada)
F. Sagués (Barcelona, Spain)
K. Showalter (Morgantown, USA)
P. Sørensen (Copenhagen, Denmark)
O. Steinbock (Tallahassee, USA)
H. Yokoyama (Tsukuba, Japan)
K. Yoshikawa (Kyoto, Japan)
Address: Harnack-Haus, Ihnestr. 16-20,
14195 Berlin-Dahlem (subway station U3 "Thielplatz")
http://www.harnackhaus-berlin.mpg.de

Information: Frau M. Reimers, phone: +49 (0) 30 8413 5102

Arrival information can be found here.

Download the conference flyer (PDF, ca. 360kB).

Program

Download a printer-friendly version of the program (PDF, ca. 62kB).

24 May, Saturday

16:00 – 20:00   Arrival and registration

25 May, Sunday

8:45 Opening

Session chair: P. De Kepper

9:00 R. Kapral (Toronto, Canada)
Twisting vortex filaments
[Abstract]

9:35 O. Steinbock (Tallahassee, USA)
Three-dimensional wave patterns in excitable systems
[Abstract]

10:10 M. Hauser (Magdeburg, Germany)
Manipulating scroll rings by an external electric current
[Abstract]

10:45 – 11:15  Coffee Break

Session chair: J. Hudson

11:15 E. Bodenschatz (Göttingen, Germany)
Interplay between symmetry breaking elements in a pattern forming system
[Abstract]

11:50 Y. Nishiura (Sapporo, Japan)
Sensitivity of localized waves to the geometry of heterogeneity
[Abstract]

12:25 – 14:00  Lunch

Session chair: H. Yokoyama

14:00 I. Epstein (Waltham, USA)
Cross-diffusion effects on pattern formation in reactive systems
[Abstract]

14:35 P. De Kepper (Bordeaux, France)
Pattern formation in the Ferrocyanide-Iodate-Sulfite reaction: the role of low mobility weak acid functions in the gel reactors
[Abstract]

15:10 A. De Wit (Brussels, Belgium)
Dynamics of A+B->C reaction fronts in the presence of buoyancy-induced convection
[Abstract]

15:45 – 16:15  Coffee break

Session chair: I. Epstein

16:15 K. Yoshikawa (Kyoto, Japan)
Self-running droplet: emergence of directional, revolutional and pseudopodial motions
[Abstract]

16:50 M. Falcke (Berlin, Germany)
Modelling cell motility: motion from chemistry
[Abstract]

17:25 F. Sagués (Barcelona, Spain)
Physics of colloids: from collective assemblies to single swimmers
[Abstract]

26 May, Monday

Session chair: Y. Nishiura

9:00 P. Gaspard (Brussels, Belgium)
Nonequilibrium chemical clocks at the nanoscale
[Abstract]

9:35 H. Yokoyama (Tsukuba, Japan)
Collective molecular motor using liquid crystallinity: exploration into the molecular origin
[Abstract]

10:10 A. S. Mikhailov (Berlin, Germany)
Nonlinear elastic dynamics in molecular machines
[Abstract]

10:45 – 11:15  Coffee Break

Session chair: P. Plath

11:15 Y. Kevrekidis (Princeton, USA)
Equation free and variable free computations for complex systems
[Abstract]

11:50 B. Fiedler (Berlin, Germany)
Delay feedback control of single mode rotating waves: opportunities and limitations
[Abstract]

12:25 – 14:00  Lunch

Session chair: E. Schöll

14:00 R. Imbihl (Hannover, Germany)
Stationary patterns vs. dynamic mass transport: potassium redistribution on a catalytic surface
[Abstract]

14:35 H. H. Rotermund (Halifax, Canada)
Putting pitting corrosion under a magnifying glass
[Abstract]

15:10 K. Krischer (Munich, Germany)
Impact of fluctuations on oscillatory reactions on nanoelectrodes
[Abstract]

15:45 – 16:15  Coffee Break

Session chair: L. Schimansky-Geier

16:15 H. Engel (Berlin, Germany)
Rotating excitation waves in circular domains
[Abstract]

16:50 M. Marek (Prague, Czech Republic)
Reactors with storage of components on catalyst surface for exhaust gases of cars
[Abstract]

17:25 C. Beta (Potsdam, Germany)
Pattern formation in chemotaxis and cell motility
[Abstract]

18:00 – 18:30  Poster session

19:00 Dinner

27 May, Tuesday

Session chair: P. Gaspard

9:00 Y. Kuramoto (Kyoto, Japan)
Two-step phase reduction for large populations of oscillators with noise
[Abstract]

9:35 J. Hudson (Charlottesville, USA)
Engineering complex dynamical structures in populations of chemical oscillators
[Abstract]

10:10 P. G. Sørensen (Copenhagen, Denmark)
Dynamical quorum sensing in yeast cells
[Abstract]

10:45 – 11:15  Coffee Break

Session chair: Y. Kuramoto

11:15 K. Showalter (Morgantown, USA)
Population density dependent behavior of discrete chemical oscillators
[Abstract]

11:50 M. Bär (Berlin, Germany)
Effective medium theory and percolation threshold for front propagation in heterogeneous reaction-diffusion systems

Abstract:
An effective medium theory for reaction-diffusion processes in spatially heterogeneous systems is derived assuming that the length scale on which the medium properties vary is substantially smaller than the typical length scale on which reaction-diffusion patterns occur. A homogenization procedure yields effective reaction rates and diffusion constants. Possible applications of the method are discussed and include pattern forming chemical reaction in micro-emulsions as well as spreading of electrical excitation in inhomogeneous, fibrose cardiac tissue. Here, we focus on testing the validity of the effective medium theory in a simple example: front propagation in two- and three-dimensional heterogeneous media. A simple five-point discretization of the Laplace operator is considered and various realization of binary media are studied within this framework. In particular, we consider media with defect sites (occurring with probability of p) that have weaker coupling to all neighbour sites and maybe reactive (medium A) or non-reactive (medium B). In addition, a medium C where the diffusion constant (assigned to bonds between neighbouring sites) takes two different values with probabilities p resp. 1 – p is studied. Systematic simulations show that the effective medium theory predicts front velocities correctly in many cases. Deviations from the theory occur if the diffusion constants used are largely different and the probability p is near the critical value for the percolation threshold. The important special case of media with holes is often not predicted well by the effective medium theory, but may be described reasonably for a given medium with knowledge of the corresponding percolation threshold.

Joint work with Sergio Alonso (PTB Berlin), Karin John (Grenoble) and Raymond Kapral (Toronto)

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12:25 G. Ertl (Berlin, Germany)
Self-organization in surface reactions - how it started

13:00 Closing

List of Posters

Posters will be presented in the Ballsaal

  1. Sergio Alonso (Berlin, Germany)
    Effective medium theory for heterogeneous excitable systems
  2. Sergio Alonso, Markus Bär (Berlin, Germany)
    Pattern formation in membranes by a translocation-diffusion mechanism
  3. Holger Flechsig, Alexander S. Mikhailov (Berlin, Germany)
    Design of elastic-network prototypes of protein machines
  4. Vladimir García-Morales, Katharina Krischer (Munich, Germany)
    Nonlocal complex Ginzburg Landau equation for electrochemical systems
  5. Santiago Gil, Alexander S. Mikhailov (Berlin, Germany)
    Controlling chaos in networks of phase oscillators
  6. Robert Hölzel, Vladimir García-Morales, Katharina Krischer (Munich, Germany)
    Coherent structures in the nonlocal complex Ginzburg Landau equation: a bifurcation analysis approach
  7. Oliver Rudzick, Alexander S. Mikhailov (Berlin, Germany)
    Nonequilibrium pattern formation in active Langmuir monolayers
  8. Michael Stich (Madrid, Spain)
    Control of spatiotemporal chaos through local time-delay feedback and pacemakers
  9. Vladimir S. Zykov (Berlin, Germany)
    Spiral wave kinematics between two excitability limits

last modified: May 23, 2008 / Oliver Rudzick

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